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. 2021 Feb 16;11:3869. doi: 10.1038/s41598-021-83474-9

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Selected region of 2D NOESY spectrum of 1/ Pu22T14T23 complex at R = 2.0. (a) The boxes display the intermolecular NOE interaction between NH imino protons with pyrrole moiety H2 and H3 and aromatic protons (H4 and H5) of 1; the inter-residue NOE interactions of NH/aromatic protons of the guanines in the tetrads are also indicated. (b) The box displays the intermolecular NOE interaction between H8 of G5 residue with pyrrole H3 of 1.